Uplink Power Control for Wireless Devices
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Solution Overview
Problem
Existing wireless communication devices face challenges in dynamically adjusting uplink power based on the distance between the device and the user's body, leading to inefficient power usage and connectivity issues, particularly when transitioning between voice and data sessions.
Innovation Solution
A system and method that determine the distance between a user's body and a wireless communication device, adjusting the uplink power accordingly, using a processor and distance detector to switch between lower and higher power levels based on predetermined thresholds, thereby optimizing power usage and connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If maximum total uplink power is hard-set and equally divided among transmitters, then power allocation is simple, but power efficiency deteriorates when transitioning between voice and data sessions
Solution Approach 1:
The patent implements dynamic uplink power adjustment by transitioning from a static, hard-set power allocation to a dynamic system that adapts power levels based on real-time conditions. The base station receives uplink power control parameters from the mobile station, determines appropriate power adjustment values, and sends control commands back to adjust the mobile station's transmit power. This dynamic adjustment allows the system to optimize power efficiency during transitions between voice and data sessions while maintaining manageable complexity through automated control loops.
2Reliability
If maximum total uplink power is set to 23 dBm when ENDC is configured, then voice communication is optimized, but data transmission performance deteriorates
Solution Approach 1:
The patent changes the power parameter dynamically based on the active service type. When voice services are active, the system maintains maximum total uplink power at 23 dBm to optimize voice communication quality. When data services become active, the system adjusts the power parameter upward to 26 dBm to improve data transmission performance. This parameter change is controlled through uplink power control mechanisms where the base station receives service type information, determines appropriate power levels, and sends control commands to the mobile station to adjust its transmit power accordingly.
3Reliability
If uplink power is increased for better connectivity, then network coverage improves, but power consumption increases
Solution Approach 1:
The patent implements a feedback-based power control system where the base station receives uplink power control parameters from the mobile station, processes this information to determine appropriate power adjustments, and sends control commands back to the mobile station. This closed-loop feedback mechanism allows the system to increase power only when and where needed for connectivity, rather than maintaining high power continuously. The feedback loop monitors channel conditions and service requirements, enabling the system to optimize the balance between network coverage and power consumption dynamically.
Data Source
AI summary
Systems and methods are provided for dynamically allocating total uplink power for a wireless communication device (WCD). A distance between a portion of a user's body (e.g., the user's ear) and the WCD is determined. It is then determined whether this distance is less than or greater than a predetermined threshold. If the distance is less than the predetermined threshold, the WCD may use a lower uplink power. If the distance is greater than the predetermined threshold, the WCD may use a higher uplink power. The WCD then transmits wireless uplink signals using either the lower or higher uplink power based on the distance between the WCD and a portion of the user's body.